When temperatures and humidity begin to rise in Wisconsin, keep a close eye on livestock. Temperatures in the high 80s and the 90s can cause problems, as well as a 75 degree F. day coupled with high humidity. Heat stress can cause general discomfort, decline in animal performance and animal death.PROVIDE SHADE AND NIGHT-TIME COOLING
Ample drinking water is vital to animals during hot and humid conditions. Animals cool themselves by panting (water loss from the lungs) and through water evaporation from the skin. Increased respiration during hot weather is especially important for pigs and other animals that do not sweat. Animals must replace the water loss to cool themselves.
Proper ventilation helps maintain livestock health during hot and humid weather. Without adequate air exchanges and airflow distribution within livestock buildings, heat and moisture accumulate and animal production is affected. Contact a ventilation specialist to inspect and update your system, if necessary. Your county Extension office also may be able to help you.BE WATCHFUL
Above 75 THI - Heat stress on high-producing cows begins
to decrease feed intake and lower milk production.
b) Above 80 THI - Severe heat stress may occur for cows on pasture. Shade and adequate ventilation are essential to minimize milk loss.
c) Above 83-85 THI - Danger of fatal heat stress occurs.
Your county agricultural agent, ventilation specialists, your veterinarian
"When Temperatures Go Up, Does Your Milk Production Go Down?" (A2881);
"Cooling Swine," (PIH87). Midwest Plan Service publications- "Heating, Cooling and Tempering Air for Livestock Housing," (MWPS-34);
"Mechanical Ventilating Systems for Livestock Housing," (MWPS-32).
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